DISPLAY PANEL AND DISPLAY DEVICE
Provided are a display panel and a display device. The display panel includes a display region and a non-display region. At least part of the non-display region is configured to be attached to a backlight module. The display panel also includes multiple heating wires located in the display region and the non-display region. In the same area, the resistance of heating wires located in the non-display region is higher than the resistance of heating wires located in the display region.
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This application claims priority to Chinese Patent Application No. CN 202311095417.6, filed on Aug. 28, 2023, the disclosure of which is incorporated herein by reference in its entirety.
TECHNICAL FIELDEmbodiments of the present application relate to the field of display technology and, in particular, to a display panel and a display device.
BACKGROUNDIn some particular usage fields of a display device, the display device is required to be suitable to a wide range of ambient temperatures. A liquid crystal display device is used as an example. Since the viscosity coefficient of a liquid crystal material increases at low temperatures, the threshold voltage increases, the response speed becomes slow, and even a liquid crystal crystallization phenomenon occurs, the liquid crystal display device cannot work normally. In the related art, to ensure that a display device works normally at low temperatures, a heating structure is generally disposed in the display device, and the display device is heated by the heating structure. However, in the related art, there is still a problem that the heating effect of a display device is not ideal.
SUMMARYIn view of the above, the present application provides a display panel and a display device to enhance the heating effect on the edge region of the display panel and ensure the consistency of the temperature of each region of the display panel.
In a first aspect, an embodiment of the present application provides a display panel. The display panel includes a display region and a non-display region. At least part of the non-display region is configured to be attached to a backlight module.
The display panel also includes multiple heating wires located in the display region and the non-display region. In the same area, the resistance of heating wires located in the non-display region is higher than the resistance of heating wires located in the display region.
In a second aspect, an embodiment of the present application provides a display device. The display device includes the display panel described in the first aspect of the present application and a backlight module. The backlight module is located on the side of the display panel facing away from the light-emitting side of the display panel.
In embodiments of the present application, the display panel includes a display region and a non-display region. At least part of the non-display region is configured to be attached to the backlight module. The display panel also includes multiple heating wires located in the display region and the non-display region. In the same area, the resistance of the heating wires located in the non-display region is higher than the resistance of the heating wires located in the display region. In the technical solutions of the present application, the heating wires may heat the display region and the non-display region of the display panel to ensure the overall heating effect of the display panel. In addition, it is also possible to enhance the heating effect of the non-display region of the display panel to make up for the problem of fast heat dissipation of the non-display region. In this manner, the temperatures of the display region and the non-display region of the display panel are relatively consistent. Thus, the normal application of the display panel is ensured, and the reliability of the display panel is improved.
Hereinafter the present application is further described in detail in conjunction with the drawings and embodiments. It is to be understood that the specific embodiments described herein are intended to illustrate and not to limit the present application. Additionally, it is to be noted that, for ease of description, only part, not all, of structures related to the present application are illustrated in the drawings.
Based on the above-mentioned drawbacks of the related art, the inventor proposes the technical solutions in the present application. In an embodiment, the present application provides a display panel. The display panel includes a display region and a non-display region. At least part of the non-display region is configured to be attached to a backlight module.
The display panel also includes multiple heating wires located in the display region and the non-display region. In the same area, the resistance of heating wires located in the non-display region is higher than the resistance of heating wires located in the display region.
In the preceding technical solutions, the heating wires may heat the display region and the non-display region of the display panel to ensure the overall heating effect of the display panel. In addition, it is also possible to enhance the heating effect of the non-display region of the display panel to make up for the problem of fast heat dissipation of the non-display region. In this manner, the temperatures of the display region and the non-display region of the display panel are relatively consistent. Thus, the normal application of the display panel is ensured, and the reliability of the display panel is improved.
The above is the core concept of the present application, and the technical solutions in the embodiments of the present application are described clearly and completely hereinafter in conjunction with the drawings in the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work are within the scope of the present application.
In an embodiment, as shown in
In addition, further referring to
It is to be understood that when the display panel 1 is heated by the heating wires 3, a current or voltage is applied to the heating wires 3 so that the heating wires 3 generate heat. The heating wires 3 may be regarded as heating conducting wires. According to the calculation formula of conductor power, the power P=I2R, I denotes the current passing through a resistor, and R denotes the magnitude of resistance. That is, when the current passing through the heating wires 3 is constant, heating power is positively correlated with the resistance of the heating wires 3. In the same area, the greater the resistance of the heating wires 3 is, the greater the heating power is. Thus, in this embodiment of the present application, the resistance of the heating wires 3 in the non-display region NA is configured to be greater than the resistance of the heating wires 3 in the display region AA. In this manner, the heating effect of the heating wires 3 on the non-display region NA of a certain area is stronger than the heating effect of the heating wires 3 on the display region AA of the same area. Thus, the heating effect on the non-display region NA of the display panel 1 is improved, and the problem of fast heat dissipation of the non-display region NA is made up. The heating effect of the heating wires 3 on different regions of the display panel 1 matches the heating requirements of the regions, so that the temperatures of the display region AA and the non-display region NA of the display panel 1 are relatively consistent. Moreover, it is ensured that the temperature of each region of the display panel 1 is maintained in the normal working temperature range of liquid crystal molecules.
It is to be noted that in the drawings of this embodiment of the present application, merely the heating wires 3 are shown. In the actual application process, a heating circuit is formed between any one or more heating wires 3. Two ends of the heating circuit are provided with heating terminals (not shown). A heating chip (not shown) supplies a current or voltage to the heating circuit through the heating terminals.
The specific arrangement and specific structure parameter of the heating wires 3 are not limited in this embodiment of the present application, and those skilled in the art may configure them according to actual requirements. It is ensured that in the same area, the resistance of heating wires 3 located in the non-display region NA is higher than the resistance of heating wires 3 located in the display region AA. In the embodiment shown in
In other embodiments not shown in the present application, multiple heating wires 3 may extend along the second direction Y and be arranged in the first direction X. The heating wires 3 extend to the display region AA and the non-display region NA in the second direction Y Alternatively, multiple heating wires 3 are grid-shaped in the first direction X and the second direction Y The heating wires 3 extend to the display region AA and the non-display region NA in both the first direction X and the second direction Y to heat the display region AA and the non-display region NA.
Those skilled in the art may configure the specific structure of the backlight module 2 and other film structures in the display panel 1 according to actual requirements. As shown in
The display panel provided by this embodiment of the present application includes a display region and a non-display region. At least part of the non-display region is configured to be attached to the backlight module. The display panel also includes multiple heating wires located in the display region and the non-display region. The heating wires may heat the display region and the non-display region of the display panel to ensure the overall heating effect of the display panel. In addition, in the present application, in the same area, the resistance of the heating wires located in the non-display region is also configured to be greater than the resistance of the heating wires located in the display region. Thus, the heating effect on the non-display region of the display panel is enhanced to make up for the problem of fast heat dissipation of the non-display region. In this manner, the temperatures of the display region and the non-display region of the display panel are relatively consistent. Moreover, it is ensured that the temperature of each region of the display panel is maintained in the normal working temperature range of liquid crystal molecules.
Optionally,
In an embodiment, as shown in
The drive mode of the heating wires 3 may be driven in a constant-current or constant-voltage manner. Those skilled in the art may configure the drive mode according to actual requirements, and this is not limited or repeated in detail in this embodiment of the present application.
Further, the calculation formula of conductor resistance is: resistance R=ρL/S. ρ denotes the resistivity of the conductor and is determined by the property of the conductor. L denotes the length of a resistor. S denotes the cross-section area of the resistor. According to this formula, when the resistivity p is constant, the resistance of the conductor is proportional to the length of the conductor and inversely proportional to the cross-section area of the conductor. Thus, in this embodiment, in the same area, the length of the second heating wires 32 may be increased and/or the width of a second heating wire 32 may be reduced to increase the resistance of the second heating wires 32 in the same area.
For example, with respect to the solution in which the length of the second heating wires 32 is increased in the same area, the first heating wires 31 may be configured to extend along a straight line in the display region AA, and the second heating wires 32 may be configured to extend in a bending manner in the non-display region NA.
In an embodiment, further referring to
The bending shape of the second heating wires 32 is not limited and may be a curved bending shape, a serpentine bending shape, or a polyline bending shape, but is not limited thereto.
In the embodiment shown in
In other embodiments, the second heating wires 32 may be configured to extend in a bending manner, and the first heating wires 31 may be configured to extend along a straight line. Moreover, the width of a second heating wire 32 is smaller than the width of a first heating wire 31. Thus, the heating effect of the heating wires 3 on the non-display region NA may be greatly improved, and the problem of faster heat dissipation in the non-display region NA is alleviated.
The regions shown in
Optionally,
In an embodiment, as shown in
Further, in this embodiment, in the direction where the first end 32a points to the second end 32b, the arrangement density of second bending units 321 gradually increases. Thus, the arrangement density of the second bending units 321 close to the outer edge of the display panel 1 is greater, and the arrangement density of the second bending units 321 close to the display region AA is smaller.
It is to be understood that the outer edge of the display panel 1 is more close to the external environment. When the temperature of the external environment is lower, the more close to the outer edge of the display panel 1 is, the faster the heat dissipation rate of the display panel 1 is. Based on this, in this embodiment, in the direction where the first end 32a of the second heating wire 32 points to the second end 32b, the arrangement density of second bending units 321 is configured to gradually increase. Thus, in the first direction X, the resistance of second heating wires 32 per unit area gradually increases, thereby enhancing the heating effect on the edge of the display panel 1 and better maintaining the temperature of the edge of the display panel 1.
Optionally,
In an embodiment, in the embodiment shown in
It is to be understood that during the display of the display panel 1, since the drive module 7 is continuously in a working state, the drive module 7 generates heat, so that there is a heat source at the second end 32b of the second heating wire 32. In this configuration, in the display panel 1, the rate of heat dissipation of the region close to the second end 32b of the second heating wire 32 may be lower than the rate of heat dissipation of the region close to the first end 32a of the second heating wire 32 (that is, the region close to display region AA). Based on this, the change rule of the arrangement density of the second bending units 321 in this embodiment may be configured to be opposite to the change rule of the arrangement density of the second bending units 321 of the embodiment shown in
In the embodiment shown in
Accordingly,
In an embodiment, in the direction where the first end 32a of the second heating wire 32 points to the second end 32b, the width of the second heating wire 32 may be gradually reduced. Thus, in this direction, the resistance of second heating wires 32 per unit area gradually increases, thereby increasing the heating effect of the second heating wires 32 at the outer edge of the display panel 1 and better maintaining the temperature of the edge of the display panel 1.
The disposition of the drive module 7 in this embodiment is the same as the disposition of the drive module 7 of the embodiment shown in
It is to be noted that in the embodiment shown in
Optionally,
In an embodiment, as shown in
In addition, it is to be noted that in the embodiment shown in
Optionally,
In an embodiment, as shown in
It is to be understood that since the irregular edge 8 extends in an arc, and the regular edge 9 extends in a straight line, two points are taken on the irregular edge 8, and the extension length of the irregular edge 8 between the two points is greater than the straight-line distance between the two points; and similarly, two points are taken on the regular edge 9, and the extension length of the regular edge 9 between the two points is equal to the straight-line distance between the two points. At this time, a certain length in the extension direction of the display region edge is used as a long side, and a certain length in the direction perpendicular to the long side is used as a short side to form a graphic. Under the area corresponding to the graphic, the extension length of the irregular edge 8 is longer than the extension length of the regular edge 9. As the extension length of the display region edge increases, the contact area between the non-display region NA and the external environment and/or the backlight module 2 increases. That is, the rate of heat dissipation of the first non-display region NA1 corresponding to the irregular edge 8 is greater than the rate of heat dissipation of the second non-display region NA2 corresponding to the regular edge 9.
Based on this, this embodiment further proposes that in the same area, the resistance of heating wires 3 located in the first non-display region NA1 may be configured to be greater than the resistance of heating wires 3 located in the second non-display region NA2. In this manner, the heating effect of the heating wires 3 on the first non-display region NA1 can be improved, so that the heating effect of the heating wires 3 on different non-display regions NA of the display panel 1 can match the heating requirements of the non-display regions NA. Further, the consistency of the temperature of each region of the display panel 1 can be ensured.
Optionally, in the same area, the length of the heating wires 3 located in the first non-display region NA1 may be configured to be greater than the length of the heating wires 3 located in the second non-display region NA2. Moreover/Alternatively, the width of a heating wire 3 located in the first non-display region NA1 may be configured to be smaller than the width of a heating wire 3 located in the second non-display region NA2. Thus, the heating wires 3 located in the first non-display region NA1 and the heating wires 3 located in the second non-display region NA2 are differentially disposed. For the implementation, reference may be made to the preceding embodiment, and the details are not repeated here.
In an embodiment, for some display devices having complex shapes, for example, a vehicle-mounted display device, the vehicle-mounted display device may include multiple types of irregular outer edges. As shown in
As shown in
Based on this, this embodiment further proposes that the heating wires 3 located in the first non-display sub-region NA11 and the heating wires 3 located in the second non-display sub-region NA12 are differentially disposed. In the same area, the resistance of third heating wires 33 located in the first non-display sub-region NA11 may be configured to be greater than the resistance of fourth heating wires 34 located in the second non-display sub-region NA12. Both the third heating wires 33 and the fourth heating wires 34 may be the second heating wires 32 in the preceding embodiments. Thus, in the same area, both the resistance of third heating wires 33 and the resistance of fourth heating wires 34 may be greater than the resistance of first heating wires 31.
In this configuration, the heating effect of the third heating wires 33 on the first non-display sub-region NA11 is stronger than the heating effect of the fourth heating wires 34 on the second non-display sub-region NA12, so that the heating effect of the heating wires 3 on different irregular non-display regions NA of the display panel 1 matches the heating requirements of the irregular non-display regions NA. Further, the consistency of the temperature of each region of the display panel 1 is ensured.
For the specifically differential disposition of the resistance of the third heating wires 33 and the resistance of the fourth heating wires 34, reference may be made to the preceding embodiment. For example, further referring to
Same as the preceding embodiments, in the same area, the length of the third heating wires 33 may be increased and/or the width of a third heating wire 33 may be reduced to increase the resistance of the second heating wires 32 per unit area. In
For example, in an optional embodiment, further referring to
In an embodiment, as shown in
In addition to the preceding embodiments, this embodiment of the present application proposes several embodiments below for reducing the resistance of the fourth heating wires 34.
For example,
In an embodiment, those skilled in the art know that the total resistance of two conductors connected in parallel is smaller than the resistance of either conductor. Based on this, as shown in
For example, further referring to
In an embodiment,
In the embodiment shown in
For example,
Optionally,
Optionally, as mentioned in the preceding embodiment, the first heating wire 31 and the second heating wire 32 are connected to each other to form a heating wire 3 extending to the display region AA and non-display region NA. In a direction perpendicular to the plane where the display panel 1 is located, the connection region 36 of the first heating wire 31 and the second heating wire 32 overlaps the display region edge 10.
Since the display region AA needs to be displayed, to ensure that the liquid crystal molecules in the display region AA work normally, the heating effect of the heating wires 3 on the display region edge 10 may be configured to be greater than the heating effect of the heating wires 3 on the non-display region NA. Also, since the display region edge 10 is more close to the outer edge of the display panel 1 than the display region AA, the heating effect of the heating wires 3 on the display region edge 10 may be configured to be greater than the heating effect of the heating wires 3 on the display region AA.
In view of the above, it is possible to further define that the width of a heating wire 3 in the connection region 36 is smaller than the width of the other part of the heating wire 3. In short, the width of a heating wire 3 in the connection region 36 is smaller than the width of the other part of the first heating wire 31 except the connection region 36 and is smaller than the width of the other part of the second heating wire 32 except the connection region 36. In this manner, under the same length, the resistance of a heating wire 3 in the connection region 36 is higher than the resistance in the other regions of the heating wire 3, thereby improving the heating effect of the heating wire 3 on the display region edge 10.
Optionally,
In the embodiment shown in
Optionally, in an optional embodiment,
As described in the preceding embodiments, the display panel 1 may include the array substrate 11. The pixel driving circuit in the array substrate 11 may include at least one transistor T. The display panel 1 may also be provided with a pixel electrode layer 112 and a common electrode layer 113. The pixel electrode layer 112 may include multiple independent pixel electrodes 1120. The common electrode layer 113 may include multiple common electrodes 1130. In the thickness direction of the display panel 1, the pixel electrodes 1120 may or may not overlap the common electrodes 1130. The common electrode layer 113 may be a common layer, but is not limited thereto.
As shown in
The transistor T may include a gate G, a source S, and a drain D. The gate G may be connected to a scan signal line (not shown). The source S (drain D) may be connected to a data signal line (not shown). The drain D (source S) may be connected to the pixel electrode 1120. Each of the preceding gate G, source S, drain D, pixel electrode 1120, and common electrode 1130 may be made of a metal material. The gate G may be formed in the gate metal layer 110. The source S and the drain D may be formed in the source and drain metal layer 111. In the present application, the heating wires 3 may be formed in any one or more layers of the preceding metal layers. Thus, a metal layer where the heating wires 3 are located does not need to be additionally prepared to ensure that the display panel 1 has a relatively thin thickness.
Optionally,
In an embodiment, as shown in
The specific value of the preset spacing threshold is not limited. Those skilled in the art may set it according to the arrangement of signal transmission lines in the non-display region NA in the practical application. This is not described in detail in the present application.
Based on the same concept, an embodiment of the present application provides a display device.
As shown in
It is to be noted that the preceding are only preferred embodiments of the present application and the technical principles used therein. It is to be understood by those skilled in the art that the present application is not limited to the embodiments described herein. For those skilled in the art, various apparent modifications, adaptations, combinations, and substitutions can be made without departing from the scope of the present application. Therefore, while the present application is described in detail in connection with the preceding embodiments, the present application is not limited to the preceding embodiments and may include equivalent embodiments without departing from the concept of the present application. The scope of the present application is determined by the scope of the appended claims.
Claims
1. A display panel, comprising a display region and a non-display region, wherein at least part of the non-display region is configured to be attached to a backlight module; and
- the display panel further comprises a plurality of heating wires located in the display region and the non-display region, wherein in a same area, resistance of heating wires located in the non-display region is higher than resistance of heating wires located in the display region.
2. The display panel according to claim 1, wherein the plurality of heating wires comprise first heating wires and second heating wires, the first heating wires are located in the display region, and the second heating wires are located in the non-display region; and
- at least one of the following applies: in a same area, a length of second heating wires of the second heating wires is greater than a length of first heating wires of the first heating wires, or a width of a second heating wire of the second heating wires is smaller than a width of a first heating wire of the first heating wires.
3. The display panel according to claim 2, wherein the first heating wires extend along a straight line in the display region, and the second heating wires extend in a bending manner in the non-display region.
4. The display panel according to claim 3, wherein a second heating wire of the second heating wires comprises at least one second bending unit, and density of the at least one second bending unit gradually increases in an extension direction of the second heating wire; and the extension direction of the second heating wire is a direction from a first end of the second heating wire close to the display region to a second end of the second heating wire away from the display region.
5. The display panel according to claim 3, wherein a second heating wire of the second heating wires comprises at least one second bending unit, and density of the at least one second bending unit gradually decreases in an extension direction of the second heating wire; and the extension direction of the second heating wire is a direction from a first end of the second heating wire close to the display region to a second end of the second heating wire away from the display region; and
- the display panel further comprises a drive module located in the non-display region, and the drive module is located on a side of at least part of the second heating wires away from the display region.
6. The display panel according to claim 3, wherein a width of a second heating wire of the second heating wires gradually decreases in an extension direction of the second heating wire; and the extension direction of the second heating wire is a direction from a first end of the second heating wire close to the display region to a second end of the second heating wire away from the display region.
7. The display panel according to claim 3, wherein a width of a second heating wire of the second heating wires gradually increases in an extension direction of the second heating wire; and the extension direction of the second heating wire is a direction from a first end of the second heating wire close to the display region to a second end of the second heating wire away from the display region; and
- the display panel further comprises a drive module located in the non-display region, and the drive module is located on a side of at least part of the second heating wires away from the display region.
8. The display panel according to claim 2, wherein the first heating wires extend in a bending manner in the display region, and the second heating wires extend in a bending manner in the non-display region; and
- the first heating wires comprise a plurality of first bending units, the second heating wires comprise a plurality of second bending units, and in a same area, density of first bending units is smaller than density of second bending units.
9. The display panel according to claim 1, wherein the display region comprises an irregular edge and a regular edge, the irregular edge comprises an arc edge, and the regular edge comprises a straight edge;
- the non-display region comprises a first non-display region and a second non-display region, the first non-display region is located on a side of the irregular edge facing away from the display region, and the second non-display region is located on a side of the regular edge facing away from the display region; and
- in a same area, resistance of heating wires located in the first non-display region is higher than resistance of heating wires located in the second non-display region.
10. The display panel according to claim 9, wherein the irregular edge comprises a first irregular edge and a second irregular edge, a connecting line between two ends of the first irregular edge is located in the display region, and a connecting line between two ends of the second irregular edge is located in the non-display region;
- the first non-display region comprises a first non-display sub-region and a second non-display sub-region, the first non-display sub-region is located on a side of the first irregular edge facing away from the display region, and the second non-display sub-region is located on a side of the second irregular edge facing away from the display region;
- the plurality of heating wires comprise first heating wires, third heating wires, and fourth heating wires, the first heating wires are located in the display region, the third heating wires are located in the first non-display sub-region, and the fourth heating wires are located in the second non-display sub-region; and
- in a same area, resistance of third heating wires of the third heating wires is higher than resistance of fourth heating wires of the third heating wires.
11. The display panel according to claim 10, wherein at least one of the following applies:
- in a same area, a length of third heating wires of the third heating wires is greater than a length of fourth heating wires of the fourth heating wires, or a width of a third heating wire of the third heating wires is greater than a width of a fourth heating wire of the fourth heating wires.
12. The display panel according to claim 11, wherein the first heating wires extend along a straight line in the display region, the third heating wires extend in a bending manner in the first non-display sub-region, and the fourth heating wires extend in a bending manner in the second non-display sub-region; and
- a third heating wire of the third heating wires comprises at least one third bending unit, a fourth heating wire of the fourth heating wires comprises at least one fourth bending unit, and in a same area, density of the at least one third bending unit is greater than density of the at least one fourth bending unit.
13. The display panel according to claim 10, wherein a fourth heating wire of the fourth heating wires comprises a first subsection and a second subsection, and the first subsection and the second subsection are connected in parallel.
14. The display panel according to claim 13, wherein the first subsection and the second subsection are disposed in a same layer and connected in parallel through a parallel subsection; or
- the first subsection and the second subsection are in different layers and connected in parallel through a via.
15. The display panel according to claim 10, wherein two adjacent fourth heating wires of the fourth heating wires are connected in parallel.
16. The display panel according to claim 2, wherein the display region comprises a display region edge that separates the display region from the non-display region; and
- one of the first heating wires is connected to one of the second heating wires, a projection of a connection region of the one first heating wire and the one second heating wire on a plane where the display panel is located overlap a projection of the display region edge on the plane where the display panel is located, and a width of a heating wire in the connection region is smaller than a width of a heating wire in other regions.
17. The display panel according to claim 1, wherein at least one of the following applies:
- at least part of the non-display region surrounds the display region, or the display region surrounds at least part of the non-display region.
18. The display panel according to claim 1, further comprising a gate metal layer, a source and drain metal layer, a pixel electrode layer, and a common electrode layer, and the plurality of heating wires are formed in any one or more of the gate metal layer, the source and drain metal layer, the pixel electrode layer, and the common electrode layer.
19. The display panel according to claim 1, further comprising a first signal transmission line, wherein at least part of the first signal transmission line is located in the non-display region; and
- spacing between a projection of a heating wire located in the non-display region and a projection of the first signal transmission line on a plane where the display panel is located is greater than or equal to a preset spacing threshold.
20. A display device, comprising a display panel and a backlight module, wherein the backlight module is located on a side of the display panel facing away from a light-emitting side of the display panel;
- wherein the display panel comprises a display region and a non-display region, wherein at least part of the non-display region is configured to be attached to a backlight module; and
- the display panel further comprises a plurality of heating wires located in the display region and the non-display region, wherein in a same area, resistance of heating wires located in the non-display region is higher than resistance of heating wires located in the display region.
Type: Application
Filed: Jan 4, 2024
Publication Date: Apr 25, 2024
Applicant: Shanghai Tianma Microelectronics Co., Ltd. (Shanghai)
Inventors: Tenggang LOU (Shanghai), Qiongqin MAO (Shanghai)
Application Number: 18/403,852